Oregon Sunstones in Rhyolite - UVc

Oregon Sunstones in Rhyolite - UVc

 

FOV: 3" wide

 

From Harney County, Oregon, USA comes this 8" wide piece of rhyolite containing Oregon Sunstones, a plagioclastic feldspar with the calcium (anorthite) percentage in the range of 10 to 30% (aka oligoclase). Oregon sunstones contain small bits of metallic copper inclusions.

 

 

The red fluorescence under UVc is due to Fe3+ replacing Al3+ ions within the aluminum silicate framework.

 

Contains:

Oligoclase (FL Red >UVc)

 

 

Shown under UVc light.

 

Series best viewed in Light Box mode using Right and Left arrows to navigate.

 

Key:

WL = White light

FL = Fluoresces

PHOS = Phosporesces

UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)

'>' = "stimulated by:"

 

18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps

Done